143 lines
7.2 KiB
JSON
143 lines
7.2 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98986",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.384Z",
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"datePublished": "2026-10-23T12:20:04.966Z",
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"dateUpdated": "2026-10-23T12:20:04.966Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-23T12:20:04.966Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnamespace: remove the fsnotify marks of a mount namespace in process context\n\nmnt_ns_release() drops the last passive reference of a mount namespace\nand removes its fanotify marks via fsnotify_mntns_delete(). That takes\nthe mutex of every group with a mark on the namespace and the spinlock\nof the connector. Fine from process context. But mnt_ns_tree_remove()\nhands the reference the namespace was allocated with to call_rcu() and\nso the marks are removed from the RCU softirq:\n\n BUG: sleeping function called from invalid context at kernel/locking/mutex.c:623\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/3\n __mutex_lock+0x113/0x24b0\n fsnotify_destroy_marks+0x11b/0x3d0\n mnt_ns_release_rcu+0x57/0xa0\n rcu_core+0x6b6/0x1e40\n\nand lockdep complains about the connector lock being taken from softirq\ncontext. A fanotify group with a FAN_MARK_MNTNS mark on the mount\nnamespace of another task is all that's needed. Root in a user\nnamespace can do that for a mount namespace it owns. The task exits and\nthe namespace is freed with the mark still on it.\n\nRemove the marks in free_mnt_ns() before the namespace is handed to RCU.\nThat runs in process context once the last active reference is gone. A\nmark is added through a file descriptor to the namespace which holds an\nactive reference so no mark can show up after that."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/namespace.c"
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],
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"versions": [
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{
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"version": "bf630c40164162ba1d3933c2f5e3397d083e0948",
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"lessThan": "888363d74c3b5d32e2accf217add70f8b38e0e2b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bf630c40164162ba1d3933c2f5e3397d083e0948",
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"lessThan": "9e820a6becdd955a04adbedfd767253a47eedd9e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bf630c40164162ba1d3933c2f5e3397d083e0948",
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"lessThan": "1a116222acdcc1bc1a8350727ae6f28907d44594",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/namespace.c"
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],
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"versions": [
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{
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"version": "6.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.11",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.2.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/888363d74c3b5d32e2accf217add70f8b38e0e2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/9e820a6becdd955a04adbedfd767253a47eedd9e"
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},
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{
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"url": "https://git.kernel.org/stable/c/1a116222acdcc1bc1a8350727ae6f28907d44594"
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}
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],
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"title": "namespace: remove the fsnotify marks of a mount namespace in process context",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |